linux-kernel - Re: [PATCH 07/13] dt-bindings: media: camss: Add qcom,sm8550-camss binding

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Message-ID: <c1539cce-92eb-43fc-9267-f6e002611bbb@linaro.org>
Date: Mon, 30 Sep 2024 09:55:19 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
 Krzysztof Kozlowski <krzk@...nel.org>, Depeng Shao
 <quic_depengs@...cinc.com>, rfoss@...nel.org, todor.too@...il.com,
 mchehab@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org
Cc: linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 kernel@...cinc.com, Yongsheng Li <quic_yon@...cinc.com>
Subject: Re: [PATCH 07/13] dt-bindings: media: camss: Add qcom,sm8550-camss
 binding

On 30/09/2024 09:46, Vladimir Zapolskiy wrote:
> Hello Krzysztof,
> 
> On 9/30/24 10:16, Krzysztof Kozlowski wrote:
>> On 25/09/2024 17:13, Depeng Shao wrote:
>>> Hi Vladimir,
>>>
>>> On 9/6/2024 11:56 PM, Vladimir Zapolskiy wrote:
>>>
>>>>> +            compatible = "qcom,sm8550-camss";
>>>>> +
>>>>> +            reg = <0 0x0acb7000 0 0xd00>,
>>>>> +                  <0 0x0acb9000 0 0xd00>,
>>>>> +                  <0 0x0acbb000 0 0xd00>,
>>>>> +                  <0 0x0acca000 0 0xa00>,
>>>>> +                  <0 0x0acce000 0 0xa00>,
>>>>> +                  <0 0x0acb6000 0 0x1000>,
>>>>> +                  <0 0x0ace4000 0 0x2000>,
>>>>> +                  <0 0x0ace6000 0 0x2000>,
>>>>> +                  <0 0x0ace8000 0 0x2000>,
>>>>> +                  <0 0x0acea000 0 0x2000>,
>>>>> +                  <0 0x0acec000 0 0x2000>,
>>>>> +                  <0 0x0acee000 0 0x2000>,
>>>>> +                  <0 0x0acf0000 0 0x2000>,
>>>>> +                  <0 0x0acf2000 0 0x2000>,
>>>>> +                  <0 0x0ac62000 0 0xf000>,
>>>>> +                  <0 0x0ac71000 0 0xf000>,
>>>>> +                  <0 0x0ac80000 0 0xf000>,
>>>>> +                  <0 0x0accb000 0 0x2800>,
>>>>> +                  <0 0x0accf000 0 0x2800>;
>>>>
>>>> Please sort the list above in numerical order, this will change 
>>>> positions
>>>> of "vfe_lite0", "vfe_lite1" etc.
>>>>
>>>> Another note, since it's not possible to map less than a page, so I 
>>>> believe
>>>> it might make sense to align all sizes to 0x1000.
>>>>
>>>
>>> Sure, I previously sorted by the alphabetical order of reg_name.
>>> I will update it based on your suggestion. And will also make sure the
>>> align all sizes to 0x1000.
>>
>> If I understood correctly, you want to change the order from existing
>> devices, so no. You are supposed to keep the same order, as much as
>> possible.
> 
> Please elaborate, what do you mean here by the "existing evices"?
> 
> The list is not sorted by reg values, I ask to sort the list by reg values.
> 
> -- 
> Best wishes,
> Vladimir

We always sort by address:

                 camss: camss@...a000 {
                         compatible = "qcom,sc8280xp-camss";

                         reg = <0 0x0ac5a000 0 0x2000>,
                               <0 0x0ac5c000 0 0x2000>,
                               <0 0x0ac65000 0 0x2000>,
                               <0 0x0ac67000 0 0x2000>,
                               <0 0x0acaf000 0 0x4000>,
                               <0 0x0acb3000 0 0x1000>,
                               <0 0x0acb6000 0 0x4000>,
                               <0 0x0acba000 0 0x1000>,
                               <0 0x0acbd000 0 0x4000>,
                               <0 0x0acc1000 0 0x1000>,
                               <0 0x0acc4000 0 0x4000>,
                               <0 0x0acc8000 0 0x1000>,
                               <0 0x0accb000 0 0x4000>,
                               <0 0x0accf000 0 0x1000>,
                               <0 0x0acd2000 0 0x4000>,
                               <0 0x0acd6000 0 0x1000>,
                               <0 0x0acd9000 0 0x4000>,
                               <0 0x0acdd000 0 0x1000>,
                               <0 0x0ace0000 0 0x4000>,
                               <0 0x0ace4000 0 0x1000>;
                         reg-names = "csiphy2",
                                     "csiphy3",
                                     "csiphy0",
                                     "csiphy1",
                                     "vfe0",
                                     "csid0",
                                     "vfe1",
                                     "csid1",
                                     "vfe2",
                                     "csid2",
                                     "vfe_lite0",
                                     "csid0_lite",
                                     "vfe_lite1",
                                     "csid1_lite",
                                     "vfe_lite2",
                                     "csid2_lite",
                                     "vfe_lite3",
                                     "csid3_lite",
                                     "vfe3",
                                     "csid3";

This is the way.

---
bod